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原位合成TiC/7075复合材料耐盐雾腐蚀性能研究
发表时间：2008-07-31 浏览量：2407 下载量：872
| 全部作者： | 孙淼，杨滨，孙其磊，许存官，崔向中 |
| 作者单位： | 北京科技大学新金属材料国家重点实验室；中国科学院国际材料物理中心；北京科技大学材料科学与工程学院腐蚀中心 |
| 摘 要： | 采用熔铸-原位合成法制备了8%（质量分数）TiC/7075复合材料，并对其耐盐雾腐蚀行为进行了研究。结果表明：1) 7075和TiC/7075两者的极化曲线相似，TiC颗粒的生成并未明显地改变7075铝合金的极化行为。原位合成质量分数为8%TiC/7075复合材料的极化曲线较之基体合金稍向负方向移动（0.036 V），自腐蚀电流密度稍高于基体合金，导致材料的腐蚀速率略微提高。2) 连续盐雾腐蚀192 h后，TiC/7075复合材料的腐蚀失重稍高于7075铝合金，原因一是TiC颗粒破坏了材料表面Al2O3膜的完整性，加速了点蚀；二是TiC颗粒/基体界面的大量存在增加了缝隙腐蚀的机率。 |
| 关 键 词： | 复合材料；铝合金；原位合成；TiC/7075复合材料；盐雾腐蚀 |
| Title： | Study of salt spray corrosive properties of TiC/7075 composite prepared by melt in-situ synthesis |
| Author： | SUN Miao, YANG Bin, SUN Qilei, XU Cunguan, CUI Xiangzhong |
| Organization： | State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing；International Centre for Materials Physics, Chinese Academy of Sciences；Corrosion and Protection Center, School of Materials Science and Engineering, Beijing University of Science and Technology |
| Abstract： | The TiC/7075 composites were synthesized by melt in-situ reaction method and the corrosive behavior of the composites were studied. The results have shown that: 1) The polarization curves of 7075 alloy and TiC/7075 composites were similar, suggesting that no significant change of the polarization behavior in the materials was found. However, the polarization curve of 8% TiC/7075 composites was found to move -0.036 V, and the corrosion current density was slightly higher comparing with the matrix alloy. It might increase the corrosion rate slightly. 2) The weight loss of TiC/7075 composites was higher than that of 7075 aluminum alloy after continuous salt spray corrosion for 192 h. The reasons of TiC/7075 composites with more serious corrosion were as follows: firstly, the TiC particles undermined the integrity of Al2O3 films, which accelerated the pitting; secondly, a number of TiC/matrix interfaces were formed in the composites, which increased the probability of crevice corrosion. |
| Key words： | composite material; aluminum alloy; in-situ synthesis; TiC/7075 composite; salt spray corrosion |
| 发表期数： | 2008年11月第14期 |
| 引用格式： | 孙淼，杨滨，孙其磊，等. 原位合成TiC/7075复合材料耐盐雾腐蚀性能研究[J]. 中国科技论文在线精品论文，2008，1（14）：1572-1579. |
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